Electric Fan Relay Wirin g Kit

The Electric Fan Relay Wiring Kit from Cold Case Radiators is a complete engine cooling solution designed for automotive enthusiasts and restoration specialists who demand precision temperature control. This kit addresses the critical need for automatic electric fan engagement, ensuring your engine maintains optimal operating temperature while eliminating the parasitic loss caused by mechanical fan clutches. Whether you're building a high-performance street machine, restoring a classic vehicle, or upgrading a daily driver's cooling system, this relay wiring kit provides a plug-and-play foundation for modern fan management.

The Electric Fan Relay Wiring Kit integrates a dual or single fan controller with a 190-degree Fahrenheit activation threshold and a 3/8 inch NPT threaded temperature sensor for direct radiator mount installation. The system operates via a harness and relay assembly that isolates high amperage fan draw from vehicle wiring, protecting factory electrical circuits and improving battery charging performance. The temperature sensor's NPT thread design ensures a secure, leak-free connection to the radiator or coolant passage, while the controller's switching logic prevents thermal runaway by cycling fans based on real-time coolant temperature rather than engine RPM alone.

This kit benefits builders and technicians who value electrical simplicity and reliability in engine bay applications. Compact at 5.2 x 2.9 x 7.7 inches and weighing just 1.63 pounds, the Electric Fan Relay Wiring Kit fits tight engine compartments without sacrificing functionality. Installation requires basic electrical knowledge and access to a suitable radiator boss or coolant line; the harness and relay mount independently from the controller, allowing flexible packaging to suit your specific build layout. Cold Case Radiators' engineering ensures compatibility with both street and track applications where consistent cooling performance directly impacts engine longevity and power output.